написать уравнения реакции как 3-ма способами можна добыть хлоретан

задания по алгебре 8 класс (упростить выражение)

log4(x+4)^2=log4(5x=20)

Помогите составить краткое содежание этого текста:
a 12-year-old boy, Andy, is sleeping in his bed late at night when a loud knock at the window makes him jump up. He stares at the window and sees an extremely tell, dark figure outside.
Andy gets scared, slips deeper under the blanket and holds his breath. He hears Ralf calling his name. Andy opens the window with a loud bang and makes a sign to Ralf to be quiet.
Ralf has a book Treasure Island in his hand and wants to read in now, in the middle of the night. Andy is extremely surprised at his suggestion and asks Ralf to explain why. Ralf does not explain. He just asks for a torch. Andy gets down on his knees and looks for it under his bed
Suddenly they see Andy is father with the torch in the doorway.

У продавца по одной такой гире : 5кг 3кг 2кг. Как с их помощью отвесить 6кг яблок?4 кг муки? Нарисуй нужные гири.Запиши числовые равенства. На одних весах 6кг яблок,а на других весах 4кг муки